134378815 has 4 divisors (see below), whose sum is σ = 161254584. Its totient is φ = 107503048.

The previous prime is 134378807. The next prime is 134378843. The reversal of 134378815 is 518873431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 134378815 - 2³ = 134378807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13437877 + ... + 13437886.

It is an arithmetic number, because the mean of its divisors is an integer number (40313646).

Almost surely, 2^134378815 is an apocalyptic number.

134378815 is a deficient number, since it is larger than the sum of its proper divisors (26875769).

134378815 is an equidigital number, since it uses as much as digits as its factorization.

134378815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26875768.

The product of its digits is 80640, while the sum is 40.

The square root of 134378815 is about 11592.1876710136. The cubic root of 134378815 is about 512.2047508212.

The spelling of 134378815 in words is "one hundred thirty-four million, three hundred seventy-eight thousand, eight hundred fifteen".